SKU: 3103-RT003 | UPC: 4957266905180
HKS 1987-1993 Toyota Supra MK3 Downpipe
The HKS 3103-RT003 downpipe replaces the restrictive factory unit on 1987-1993 Toyota Supra MK3 turbo models equipped with the 7M-GTE engine. Mandrel-bent SUS304 stainless steel tubing delivers smoother exhaust flow and reduced backpressure for quicker turbo spool-up and noticeable horsepower increases. This direct bolt-on upgrade enhances throttle response and overall engine performance without compromising fitment.
Key Features
- SUS304 Stainless Steel Construction: Full polished finish resists corrosion and heat for long-lasting durability under high exhaust temperatures.
- Mandrel-Bent 80mm Piping: Seamless bends maintain consistent diameter to minimize turbulence and maximize exhaust velocity.
- High-Flow Design: Eliminates restrictions from stock catalytic converter section for improved scavenging and turbo efficiency.
- Precision TIG Welds: Robotically welded joints ensure leak-free seals and structural integrity at high boost levels.
- Complete Hardware Kit: Includes gaskets, flange nuts, bolts, and O2 sensor bung adapter for straightforward installation.
Product Notes
- Designed for off-road or track use where emissions testing is not required.
- Inspect O2 sensor wiring before installation to avoid damage.
- Packages ship in a protective cardboard tube or box to prevent bending.
Installation Notes
- Professional installation recommended.
- Requires lifting the vehicle and removing the stock downpipe from turbo outlet to mid-pipe connection.
- Compatible with factory turbo flange and exhaust hangers. O2 sensor extension may be needed for relocated bung.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1987-1992 | Toyota | Supra | Turbo (7M-GTE) |
| 1986-1993 | Toyota | Supra | MK3 Turbo (JDM MA70, 7M-GTE) |
Why Choose HKS?
- Decades of JDM motorsport engineering focused on Toyota platforms.
- Premium materials tested in endurance racing for reliability.
- Exact OEM-like fitment from factory CAD data and dyno development.
Frequently Asked Questions
- Q: Will this downpipe fit my 1989 Supra Turbo?
A: Yes, it bolts directly to 1987-1992 USDM Supra Turbo models with 7M-GTE engine and 1986-1993 JDM MA70 equivalents. - Q: What is the pipe material and diameter?
A: Constructed from full SUS304 stainless steel with an 80mm (3-inch) mandrel-bent diameter for optimal flow. - Q: What power gains can I expect?
A: Typical dyno-tested improvements include 10-15 wheel horsepower plus faster turbo spool by 200-300 RPM when paired with a tune.
Shipping & Handling
- Method: UPS Ground or FedEx Ground
- Availability: In stock – ships same or next business day
- Packaging: Sturdy reinforced box measuring 40 x 12 x 10 inches
- Weight: 11.5 lbs (product). 15 lbs (shipping)
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